How come all the exterior views of Empok Nor showed it tilted at an angle?

Plotline

In need of replacement parts, O'Brien leads a team to DS9's abandoned sister facility, Empok Nor. But the Cardassians have left a team of fanatical commandos in stasis on the station, pumped full of drugs that heighten their aggression. Soon Garak is also affected, leaving O'Brien alone and fighting for his life.